PDF malware analysis — malicious · f82a102eb4311112

MALICIOUS

PDF

6.3 KB

MD5: a8a9909e29f381cdf23c4dce7dd51d1b SHA-1: ea063168083e5d8aeef4262426b1d8af852af80b SHA-256: f82a102eb4311112eaccfdfa83fc605a633e62fcb22f995764beebc36bbcf3c0

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File

The PDF file contains embedded JavaScript and triggers a critical heuristic for CVE-2008-2992, indicating exploitation of a known vulnerability. The presence of obfuscated JavaScript, identified by ClamAV as Heuristics.PDF.ObfuscatedNameObject, suggests an attempt to hide malicious code. The extracted JavaScript is likely responsible for downloading and executing a second-stage payload, a common technique for malware delivery.

Heuristics 6

util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992

PDF JavaScript calls util.printf() — CVE-2008-2992 is a stack buffer overflow in Adobe Reader triggered by a long format-specifier argument. Widely exploited in the wild after disclosure. (matched in decompressed stream)
ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `957af8974a0a82d4051c24c99d54ea737dc4622b20c9582d5335e803a58945f5`	pdf-javascript-stream	PDF /JS object 6 at offset 0x199	5301 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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